Releasing thermoplastic film, and method of making
AssigneeToray Plastics (America), Inc.
InventorsJohn Fitch, Steven J. Sargeant
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Abstract
Recycleable releasing polyethylene terephthalate film coated with a coating of polyethylene emulsion, polyurethane dispersion, or a mixture of the two, with an acrylic or polyester cobinder, which film is uniaxially oriented and thereafter coated with the coating and oriented in a direction transverse to the direction of the film's uniaxial orientation to generate a biaxially oriented film having a uniaxially oriented coating and a method of making the film.
Claims13
A releasing polyester film comprising an uniaxially oriented polyethylene terephthalate film having a surface coating wherein said polyester film has a low surface energy, and wherein said coating comprises at least one component selected from the group consisting of a polyethylene emulsion, polyurethane dispersion, and a mixture of polyethylene emulsion and polyurethane dispersion.
A method of making a releasing polyester film comprising the steps of stretching said film to generate a uniaxially oriented film and applying to said uniaxially oriented film a coating comprising at least one component selected from the group consisting of a polyethylene emulsion, polyurethane dispersion, and a mixture of polyethylene emulsion and polyurethane dispersion, and then stretching said coated film to provide a biaxially oriented film having a uniaxially oriented coating.
A polyester film comprising a biaxially oriented polyethylene terephthalate film having a uniaxially oriented polyethylene or polyurethane coating.
Dependencies are inferred from the claim text.